70672557 has 4 divisors (see below), whose sum is σ = 94230080. Its totient is φ = 47115036.

The previous prime is 70672549. The next prime is 70672559. The reversal of 70672557 is 75527607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 70672557 - 2³ = 70672549 is a prime.

It is a super-2 number, since 2×70672557² = 9989220625836498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70672559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11778757 + ... + 11778762.

It is an arithmetic number, because the mean of its divisors is an integer number (23557520).

Almost surely, 2^70672557 is an apocalyptic number.

It is an amenable number.

70672557 is a deficient number, since it is larger than the sum of its proper divisors (23557523).

70672557 is a wasteful number, since it uses less digits than its factorization.

70672557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23557522.

The product of its (nonzero) digits is 102900, while the sum is 39.

The square root of 70672557 is about 8406.6971516762. The cubic root of 70672557 is about 413.4442296238. Note that the first 3 decimals are identical.

The spelling of 70672557 in words is "seventy million, six hundred seventy-two thousand, five hundred fifty-seven".