70551557 has 4 divisors (see below), whose sum is σ = 73619040. Its totient is φ = 67484076.

The previous prime is 70551553. The next prime is 70551571. The reversal of 70551557 is 75515507.

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 a cyclic number.

It is not a de Polignac number, because 70551557 - 2² = 70551553 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 (70551553) 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, 1533707 + ... + 1533752.

It is an arithmetic number, because the mean of its divisors is an integer number (18404760).

Almost surely, 2^70551557 is an apocalyptic number.

It is an amenable number.

70551557 is a deficient number, since it is larger than the sum of its proper divisors (3067483).

70551557 is a wasteful number, since it uses less digits than its factorization.

70551557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067482.

The product of its (nonzero) digits is 30625, while the sum is 35.

The square root of 70551557 is about 8399.4974254416. The cubic root of 70551557 is about 413.2081392576.

The spelling of 70551557 in words is "seventy million, five hundred fifty-one thousand, five hundred fifty-seven".