70351661 has 16 divisors (see below), whose sum is σ = 78926400. Its totient is φ = 62316288.

The previous prime is 70351657. The next prime is 70351663. The reversal of 70351661 is 16615307.

It is not a de Polignac number, because 70351661 - 2² = 70351657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70351663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55250 + ... + 56508.

It is an arithmetic number, because the mean of its divisors is an integer number (4932900).

Almost surely, 2^70351661 is an apocalyptic number.

It is an amenable number.

70351661 is a deficient number, since it is larger than the sum of its proper divisors (8574739).

70351661 is a wasteful number, since it uses less digits than its factorization.

70351661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 70351661 is about 8387.5897014577. The cubic root of 70351661 is about 412.8175181263.

Adding to 70351661 its reverse (16615307), we get a palindrome (86966968).

The spelling of 70351661 in words is "seventy million, three hundred fifty-one thousand, six hundred sixty-one".