70621660 has 24 divisors (see below), whose sum is σ = 150340176. Its totient is φ = 27861120.

The previous prime is 70621657. The next prime is 70621667. The reversal of 70621660 is 6612607.

It is a super-2 number, since 2×70621660² = 9974837722311200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70621667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22726 + ... + 25645.

It is an arithmetic number, because the mean of its divisors is an integer number (6264174).

Almost surely, 2^70621660 is an apocalyptic number.

It is an amenable number.

70621660 is an abundant number, since it is smaller than the sum of its proper divisors (79718516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70621660 is a wasteful number, since it uses less digits than its factorization.

70621660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48453 (or 48451 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 70621660 is about 8403.6694366211. The cubic root of 70621660 is about 413.3449542923.

It can be divided in two parts, 706 and 21660, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 70621660 in words is "seventy million, six hundred twenty-one thousand, six hundred sixty".