70503661 has 10 divisors (see below), whose sum is σ = 74558062. Its totient is φ = 66669480.

The previous prime is 70503647. The next prime is 70503673. The reversal of 70503661 is 16630507.

It can be written as a sum of positive squares in only one way, i.e., 57471561 + 13032100 = 7581^2 + 3610^2 .

It is not a de Polignac number, because 70503661 - 2²⁵ = 36949229 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 (70503061) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 130051 + ... + 130591.

Almost surely, 2^70503661 is an apocalyptic number.

It is an amenable number.

70503661 is a deficient number, since it is larger than the sum of its proper divisors (4054401).

70503661 is an frugal number, since it uses more digits than its factorization.

70503661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 70503661 is about 8396.6458184206. The cubic root of 70503661 is about 413.1146119227.

The spelling of 70503661 in words is "seventy million, five hundred three thousand, six hundred sixty-one".